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One kind of component which the laser is the use stimulated radiation process produces the light which and the light enlarges, sends out the light from it to have the extremely good coherence, the monochromaticity, the directivity and the extremely high brightness, is advantageous for the people to control and to use it. Therefore this kind of photo source is used to do the light rock drill communications system's photo source

The use of lasers by stimulated emission of the light and a light amplification device, it's light from the excellent coherence, monochrome, directional and high brightness, for people to control and use it. So this light-solder was used as the source communication system

Laser use is generated by stimulated emission of light and an optical amplification device, it issued from the excellent optical coherent, monochromatic, direction and high brightness, ease of control and people use it. So this source was used as the light source brazing Communication System "